The Tor Browser: netwerk/base/src/nsURLHelperOSX.cpp@6474c204b198 (annotated)

netwerk/base/src/nsURLHelperOSX.cpp@6474c204b198 (annotated)

netwerk/base/src/nsURLHelperOSX.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim:set ts=2 sw=2 et cindent: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /* Mac OS X-specific local file uri parsing */
 #include "nsURLHelper.h"
 #include "nsEscape.h"
 #include "nsIFile.h"
 #include "nsTArray.h"
 #include "nsReadableUtils.h"
 #include <Carbon/Carbon.h>
 static nsTArray<nsCString> *gVolumeList = nullptr;
 static bool pathBeginsWithVolName(const nsACString& path, nsACString& firstPathComponent)
 {
   // Return whether the 1st path component in path (escaped) is equal to the name
   // of a mounted volume. Return the 1st path component (unescaped) in any case.
   // This needs to be done as quickly as possible, so we cache a list of volume names.
   // XXX Register an event handler to detect drives being mounted/unmounted?
   if (!gVolumeList) {
     gVolumeList = new nsTArray<nsCString>;
     if (!gVolumeList) {
       return false; // out of memory
     }
   }
   // Cache a list of volume names
   if (!gVolumeList->Length()) {
     OSErr err;
     ItemCount volumeIndex = 1;
     do {
       HFSUniStr255 volName;
       FSRef rootDirectory;
       err = ::FSGetVolumeInfo(0, volumeIndex, nullptr, kFSVolInfoNone, nullptr,
                               &volName, &rootDirectory);
       if (err == noErr) {
         NS_ConvertUTF16toUTF8 volNameStr(Substring((char16_t *)volName.unicode,
                                                    (char16_t *)volName.unicode + volName.length));
         gVolumeList->AppendElement(volNameStr);
         volumeIndex++;
       }
     } while (err == noErr);
   }
   // Extract the first component of the path
   nsACString::const_iterator start;
   path.BeginReading(start);
   start.advance(1); // path begins with '/'
   nsACString::const_iterator directory_end;
   path.EndReading(directory_end);
   nsACString::const_iterator component_end(start);
   FindCharInReadable('/', component_end, directory_end);
   nsAutoCString flatComponent((Substring(start, component_end)));
   NS_UnescapeURL(flatComponent);
   int32_t foundIndex = gVolumeList->IndexOf(flatComponent);
   firstPathComponent = flatComponent;
   return (foundIndex != -1);
 }
 void
 net_ShutdownURLHelperOSX()
 {
   delete gVolumeList;
   gVolumeList = nullptr;
 }
 static nsresult convertHFSPathtoPOSIX(const nsACString& hfsPath, nsACString& posixPath)
 {
   // Use CFURL to do the conversion. We don't want to do this by simply
   // using SwapSlashColon - we need the charset mapped from MacRoman
   // to UTF-8, and we need "/Volumes" (or whatever - Apple says this is subject to change)
   // prepended if the path is not on the boot drive.
   CFStringRef pathStrRef = CFStringCreateWithCString(nullptr,
                               PromiseFlatCString(hfsPath).get(),
                               kCFStringEncodingMacRoman);
   if (!pathStrRef)
     return NS_ERROR_FAILURE;
   nsresult rv = NS_ERROR_FAILURE;
   CFURLRef urlRef = CFURLCreateWithFileSystemPath(nullptr,
                               pathStrRef, kCFURLHFSPathStyle, true);
   if (urlRef) {
     UInt8 pathBuf[PATH_MAX];
     if (CFURLGetFileSystemRepresentation(urlRef, true, pathBuf, sizeof(pathBuf))) {
       posixPath = (char *)pathBuf;
       rv = NS_OK;
     }
   }
   CFRelease(pathStrRef);
   if (urlRef)
     CFRelease(urlRef);
   return rv;
 }
 static void SwapSlashColon(char *s)
 {
   while (*s) {
     if (*s == '/')
       *s = ':';
     else if (*s == ':')
       *s = '/';
     s++;
   }
 }
 nsresult
 net_GetURLSpecFromActualFile(nsIFile *aFile, nsACString &result)
 {
   // NOTE: This is identical to the implementation in nsURLHelperUnix.cpp
   nsresult rv;
   nsAutoCString ePath;
   // construct URL spec from native file path
   rv = aFile->GetNativePath(ePath);
   if (NS_FAILED(rv))
     return rv;
   nsAutoCString escPath;
   NS_NAMED_LITERAL_CSTRING(prefix, "file://");
   // Escape the path with the directory mask
   if (NS_EscapeURL(ePath.get(), ePath.Length(), esc_Directory+esc_Forced, escPath))
     escPath.Insert(prefix, 0);
   else
     escPath.Assign(prefix + ePath);
   // esc_Directory does not escape the semicolons, so if a filename
   // contains semicolons we need to manually escape them.
   // This replacement should be removed in bug #473280
   escPath.ReplaceSubstring(";", "%3b");
   result = escPath;
   return NS_OK;
 }
 nsresult
 net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
 {
   // NOTE: See also the implementation in nsURLHelperUnix.cpp
   // This matches it except for the HFS path handling.
   nsresult rv;
   nsCOMPtr<nsIFile> localFile;
   rv = NS_NewNativeLocalFile(EmptyCString(), true, getter_AddRefs(localFile));
   if (NS_FAILED(rv))
     return rv;
   nsAutoCString directory, fileBaseName, fileExtension, path;
   bool bHFSPath = false;
   rv = net_ParseFileURL(aURL, directory, fileBaseName, fileExtension);
   if (NS_FAILED(rv))
     return rv;
   if (!directory.IsEmpty()) {
     NS_EscapeURL(directory, esc_Directory|esc_AlwaysCopy, path);
     // The canonical form of file URLs on OSX use POSIX paths:
     //   file:///path-name.
     // But, we still encounter file URLs that use HFS paths:
     //   file:///volume-name/path-name
     // Determine that here and normalize HFS paths to POSIX.
     nsAutoCString possibleVolName;
     if (pathBeginsWithVolName(directory, possibleVolName)) {
       // Though we know it begins with a volume name, it could still
       // be a valid POSIX path if the boot drive is named "Mac HD"
       // and there is a directory "Mac HD" at its root. If such a
       // directory doesn't exist, we'll assume this is an HFS path.
       FSRef testRef;
       possibleVolName.Insert("/", 0);
       if (::FSPathMakeRef((UInt8*)possibleVolName.get(), &testRef, nullptr) != noErr)
         bHFSPath = true;
     }
     if (bHFSPath) {
       // "%2F"s need to become slashes, while all other slashes need to
       // become colons. If we start out by changing "%2F"s to colons, we
       // can reply on SwapSlashColon() to do what we need
       path.ReplaceSubstring("%2F", ":");
       path.Cut(0, 1); // directory begins with '/'
       SwapSlashColon((char *)path.get());
       // At this point, path is an HFS path made using the same
       // algorithm as nsURLHelperMac. We'll convert to POSIX below.
     }
   }
   if (!fileBaseName.IsEmpty())
     NS_EscapeURL(fileBaseName, esc_FileBaseName|esc_AlwaysCopy, path);
   if (!fileExtension.IsEmpty()) {
     path += '.';
     NS_EscapeURL(fileExtension, esc_FileExtension|esc_AlwaysCopy, path);
   }
   NS_UnescapeURL(path);
   if (path.Length() != strlen(path.get()))
     return NS_ERROR_FILE_INVALID_PATH;
   if (bHFSPath)
     convertHFSPathtoPOSIX(path, path);
   // assuming path is encoded in the native charset
   rv = localFile->InitWithNativePath(path);
   if (NS_FAILED(rv))
     return rv;
   NS_ADDREF(*result = localFile);
   return NS_OK;
 }

The Tor Browser / annotate

netwerk/base/src/nsURLHelperOSX.cpp@6474c204b198 (annotated)

netwerk/base/src/nsURLHelperOSX.cpp